Rocket Volume Spec

rkt-volume

App1.aci:
```
{
 "mountPoints": [
   {
    "name": "A",
    "path": "/app1/a"
   },
   {
    "name": "B",
    "path": "/app1/b"
   }
 ]
}
```

App2:
```
{
  "mountPoints": [
    {
      "name": "A",
      "path": "/app2/a"
    }
  ]
}
```

App3:
```
{
  "mountPoints": [
    {
      "name": "B",
      "path": "/app3/b"
    }
  ]
}
```

rkt run -volume A:/opt/lib/A -volume B:/opt/lib/B App1.aci App2.aci App3.aci

will this generate a container manifest like this one ?:
```
{
... app details goes here
"volumes": [
  {
    "kind": "host",
    "source": "/opt/lib/A",
    "fulfills": [
      "A"
    ]
  },
  {
    "kind": "host",
    "source": "/opt/lib/B",
    "fulfills": [
      "B"
    ]
  }
]
}
```